* Handles shields properly for warriors, paladins, and shamans
* Should no longer error on MoP, will flesh out MoP support in the future.
* Auto selects the Most Valuable item now, this logic may get enhanced in the future, or disabled depending on feedback.

I've made a fix that I think should fix the shields and off hands from getting discolored, however I've been trying to find a quest on a char that fits into that category, and have yet to. Let me know if it works.

Trinkets are now universal equipment slots (will never be discolored).
Changed most valuable item display, look for the one marked with a gold "MV".
Added an ilevel differential display comparing the item your being offered and the one you're wearing.